Since my husband and I were married, 11 years ago, we have been sleeping on a bed, on the floor!  It just wasn't something that bothered us enough to change!
However, recently, I decided that it was time for our bedroom to stop looking like a bachelor pad, with a mattress on the ground.  
This bed frame is a good height off of the floor, and although its metal, its not "cheap" looking, the feet give it a more "industrial " feel, versus plastic casters.

Pros: sturdy, durable, attractive, easy to assemble (two people), Fits our Cal King (72"w.)
Cons: "Feet" are plastic- but so far so good.